Shigella is transmitted by
a. food
b. flies
c. feces
d. all of these
Bacteria are microscopic organisms which belong to prokaryote because these are unicellular organisms. Bacteria are divided into various typed based on their shape like cocci, spirlla, bacilli etc and on staining into gram positive and gram negative stain bacteria.
Based on the staining the bacteria are of 2 types gram positive bacteria and gram negative bacteria. Gram positive bacteria have thick peptidoglycan layer in the cell wall and in gram negative bacteria the cell wall is very thin and based on the oxygen consumption there are different types, aerobic, anerobic, obligate aerobic, obligate anaerobic, facultative anaerobes, microaerophiles, aerotolerant anaerobes.
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